Cell in solar panel produces energy due to ??
An iron rod placed in a strong magnetic field for some time would convert into? a. permanent magnet b.temporary magnet c. >>>>> d.none of these
Mechanism of a jet engine
An electric train is travelling 40km/h towards east, what would be the direction of its smoke??
The temperature of steam used in steam engine after creating energy? a.increases b.decreases c.does not change d.None of these
Water in Tarbela Dam runs from turbines to ???
A pin sinks in water but not a large ship? Why?
Radio waves travel ___________ than sound waves? a. faster b. slower c.same speed d. None of these
Sound travels fastest in __________? a. biological medium b. rarer medium c. dense medium d. none of these

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People do not like to think. If one thinks, one must reach conclusions. Conclusions are not always pleasant.